12-40mm being being more larger/heavier than 12-35mm and come without OIS, should make Pana user and maybe some Oly user sticking with 12-35mm instead for the size and without looking ridiculous on their camera.

Though the magnification of 12-40 screams Macro to me, that is even higher than Voigtlander's 0.25x/0.5x magnificaiton which I found to be plentiful for my need without getting dedicated Macro lens.